This module provides a standard library of functions and widgets
for use in creating Curses-based interfaces. Should work reliably
with both Curses and nCurses libraries.

Current widgets include:

        Text field (txt_field) 
        List box (list_box)
        Button sets (buttons) 
        Calendar (calendar) 
        Message box (msg_box) 
        Input box (input_box)

Extra functions include:

        select_colour line_split grab_key init_scr
